Matched context for compression and expulsion

The page lists matched contexts for compression and expulsion.

Share - compression	Share - expulsion	Phrase
27.32%	13.16%	{compression or expulsion} stroke
0.17%	7.37%	cause {compression or expulsion} [perform operation]
0.21%	3.43%	air {compression or expulsion}
0.08%	9.03%	gas {compression or expulsion}